Originally Posted by meatyrem
Every gun will be different though. What one gun can handle as safe pressure another one will be well under that load. I met a guy once that used 96gr of r-25 and a 180gr scirocco at 3400fps. I would think if your at 81557 psi you should be seeing deffinately signs of pressure. Another member on here states that your velocity will tell you where your pressure is, under a chrono. Can't really say, just play it safe and be cautious.
Please do not misunderstand my post to think that the velocity will determine pressure! That is NOT the case.
What I meant to convey is that each gun performs differently with a number of powder, brass, bullet, and primer combinations. A load that is not over pressure in one gun may be VERY over pressure in another simply because of the way the chamber was cut.
Alliant shows 180 grain bullet with RL 25 in a 300 RUM to perform at 3146 with the max load (94 grains) for THEIR test gun.
This was approved by their attorneys.
Remember that we are dealing with extremely deadly, controlled explosions right next to our heads.
Be very cautious when exceeding published load data.